SOUTH AMERICAN NEMATOGNATHI. 159 



Gill-membranes separate to below the anterior margin 

 of the eye. 



Eye li-li in snout, 3J-4 in head, equidistant from 

 snout and posterior margin of opercle; interorbital 1J 

 in eye. 



Dorsal spine equidistant from snout and anal, its height 

 1^ in head, the longest rays equal to the head in length. 



Adipose dorsal 3f-4 in the length, its distance from 

 the dorsal fin equals the base of the latter. 



Caudal lobes of equal width, the upper longer, 4 in 

 the length. Anal rounded, its longest rays IJ-l* in 

 head. 



Ventrals inserted behind the vertical from the last 

 dorsal ray, IJ-IJ in head, their tips about J of their 

 length from the anal. 



Pectoral spine little less than the head in length. 



Color, light brown; a dusky lateral band; tips of the 

 fins dusky. 



Head4J-5; depth 5J-6J; Br. 7; D. I, 6; A. 12-14. 



117, Pimelodella vittata, 



Pseudorhamdia vittata (Kroyer) Llitken, Velhas Flodens Fiske 

 Vidensk. Selsk. Skr. 1874, 34 (Kio das Velhas); id. 1. c. 1875, 

 173, fig. (Eio das Velhas). 



Pimelodella vittata Eigenm. & Eigenm. Proc. Cal. Acad. 2d Ser. 

 i, 133, 1888 (Eio San Francisco; Minas Geraes; Sao Matheos; 

 Eio Jequitinhonha). 



Habitat: Streams of Minas Geraes and Bahia emptying in the At- 

 lantic. 



Thirty-five specimens. Eio San Francisco; Minas 

 Geraes; Sao Matheos; Rio Jequitinhonha. 



Elongate, compressed posteriorly. Head rather broad, 

 its width 1J in its length, at the rictus 2J, the depth at 

 base of occipital process 1J in its length; profile convex 

 longitudinally, strongly convex transversely. 



Occipital process scarcely extending to the dorsal plate. 



Teeth in bands of equal depth in both jaws, the 



